Wrong Class

Imagine if the following chain of events happened to you. Have a little fun. Try to figure out where you would have given in and hit the road . The following is all true and unembellished. You couldn't make up stuff this good.

-- You sit down in class. (Yes, this was a tough step for some of us.)
-- Girls that you don't recognize are talking about homework that sounds strange and unfamiliar.
-- Someone next to you is copying notes that don't look like anything you've learned.
-- Your professor walks in . . . only it's NOT your professor.
-- You learn that you're sitting in a Chemistry class . . . you're not enrolled in any Chemistry classes.
-- You realize that it's 10 o'clock yet the class that you have in this room starts at 11.
-- "Your" professor hands out an exam.
-- You decide not to leave because you don't want to be "that guy".
-- You take the exam.
-- You turn it in, signing your name Mitch Casey (Here's pointing at you "Mitch").